1-Year Warranty: Money-back satisfaction guarantee Health professionals still prefer the accuracy and reliability of the old-fashioned squeeze-bulb style of blood pressure monitors. This type of gauge is known as a "sphygmomanometer," and "aneroid" means it uses a dial rather than a column of mercury. Home users, medical professionals, and those in training to become health professionals will all love this gauge. Special Aluminium alloy manometer, classic nylon cuff 2-tube adult size PVC bladder, standard PVC bulb large air-release valve with spring taper end valve Vinyl zipper bag.Perfect for home, medical professionals, and nurses. Package includes: 1 x Aneroid sphygmomanometer 1 x Vinyl zipper bag.